Allow drivers to use the modern request and configure idiom togetherwith devres.

As with plain gpio_request() and gpio_request_one() we can't implementthe old school version in terms of _one() as this would force theexplicit selection of a direction in gpio_request() which could breaksystems if we pick the wrong one. Implementing devm_gpio_request_one()in terms of devm_gpio_request() would needlessly complicate things orlead to duplication from the unmanaged version depending on how it'sdone.